<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" type="texy/css" href="./css/index.css"/>
    <title>小黑日记</title>
</head>
<body>
   <section id="todoapp">
   <!--输入框-->
<header class="header">
    <h1>小黑日记本</h1>
    <input v-model="inputValue"  @keyup.enter="add" autofocus="autofocus" autocomplete="off"
    placeholder="请输入任务" class="new-todo"/>
</header>
<!--列表区域-->
<section class="main">
    <ul class="todo-list">
        <li class="todo" v-for="(item,index) in list">
            <div class="view">
                <span class="index">{{ index+1 }}.</span>
                <label>{{ item }}</label>
                <button class="destory" @click="remove(index)"></button>
            </div>
        </li>
    </ul>
</section> 
<!--统计和清空-->
<footer class="fotter" v-show="list.length!=0">
<span class="todo-count" v-if="list.length!=0"> 
    <strong>{{ list.length }}</strong> items left</span>
    <button  v-show="list.length!=0" class="clear-completes" @click="clear">
        Clear
    </button>
</footer>
</section> 
<!--底部-->
<footer class="info">
<p>
    <a href="http://www.itheima.com/"><img src="./img//black.png" alt="" /></a>
</p>
</footer>
<!-- 开发环境版本，包含了有帮助的命令行警告--> 
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
    //3.创建Vue实例
    var app=new Vue({
        el:"#todoapp",
        data:{
            list:["写代码","吃饭饭","睡觉觉"],
            inputValue:"好好学习，天天向上"
        },
        methods:{
            add:function(){
                this.list.push(this.inputValue);
            },
            remove:function(index){
                console.log("删除");
                console.log(index);
                this.list.splice(index,1);
            },
            clear:function(){
                this.list = [];
            }
        },
    })
    </script>
</body>
</html>